CVE-2026-98272

Kernel memory corruption via unchecked MTU buffer switch

Published Oct 6, 2026 · Updated Oct 6, 2026

Out-of-bounds access in the Linux mvpp2 driver allows local users with network-administration privileges to corrupt kernel memory via an MTU change. The mvpp2_change_mtu path switches to per-CPU buffers without rechecking whether twice the RX queue count fits the eight-pool limit, so mvpp2_bm_init accesses beyond priv->page_pool. The path requires an mvpp2-backed interface, a qualifying queue configuration, and privilege to change its MTU; network traffic alone is not shown to reach it.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Out-of-bounds access in the Linux mvpp2 driver allows local users with network-administration privileges to corrupt kernel memory via an MTU change. The mvpp2_change_mtu path switches to per-CPU buffers without rechecking whether twice the RX queue count fits the eight-pool limit, so mvpp2_bm_init accesses beyond priv->page_pool. The path requires an mvpp2-backed interface, a qualifying queue configuration, and privilege to change its MTU; network traffic alone is not shown to reach it.

The record

CVE
CVE-2026-98272
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4
  2. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <14cb1e7702e5cb3c58888f6aed498381a73927d2
  3. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <1734c3fc0066e228ce1c11e434b7c2527f0a949a
  4. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <4ac1d5adc4f4dbafbfd270b55cc6d8bf9849d545
  5. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <5cefdb7acfc646fbded59ae77dfe0aac4c9e4a3c
  6. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <6569fd85b0ef9a8a6f20b7eb868420b8c7c0c2a0
  7. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <dfd46b5584a5881b131008767950e1ab82713c8c
  8. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <e7f30dcfa6c64033bf9137362517bd248e5be384
  9. Affected versionversion=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <f0e7d62c1eb984dd204095118973c59604144cd8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <14cb1e7702e5cb3c58888f6aed498381a73927d2; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <1734c3fc0066e228ce1c11e434b7c2527f0a949a; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <4ac1d5adc4f4dbafbfd270b55cc6d8bf9849d545; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <5cefdb7acfc646fbded59ae77dfe0aac4c9e4a3c; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <6569fd85b0ef9a8a6f20b7eb868420b8c7c0c2a0; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <dfd46b5584a5881b131008767950e1ab82713c8c; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <e7f30dcfa6c64033bf9137362517bd248e5be384; version=7d04b0b13b1175ce0c4bdc77f1278c1f120f874f <f0e7d62c1eb984dd204095118973c59604144cd8

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started